I think your logic is correct. I got help from Intuit and I was able to do what I needed to do. Actually, since the UBIT return was rejected, I don't think I even need to amend it. But I got confused when I went to the pulldown, and none of the options, "lock," "unlock," or "amend" were there.

I think it is problematic that, in order to efile the CA LLC and DC UBIT returns, we have to keep unlocking the return. Intuit should work on that.

Thanks for your response.